What are three examples of convection currents that occur in natural cycles?

1.Radiator

2.Steaming cup of hot tea

3.Ice melting

Explanation:

1.Puts warm air out at the top and draws in cooler air at the bottom.

2.The steam is showing heat being transfered into the air.

3.Heat moves to the ice from the air. This causes the melting from a solid to liquid.

the entire statement is true and correct.  

there's no diagram, nothing is illustrated, and no question is asked.

the box does not move because you need to use a force greater than 300 n. you are only using 50 n. it needs to at least be 301 n for the box to move because then it is an unbalanced force and it will move the way that the greater force is pushing it. if you use only 300 n it will be a balanced force and will not move because the force you are exerting on the   box is the same as its force.

hope this !

im sorry if i went too in depth, i am going to include a link to a video on khan academy that will explain this.   hope that you like the video and that it explains more in detail to you.

that is the link.